consolidate reasoning enums into one (#2428)

We have three enums for each of reasoning summaries and reasoning effort
with same values. They can be consolidated into one.

codex-rs/core/src/config_profile.rs

@@ -1,9 +1,9 @@
 use serde::Deserialize;
 use std::path::PathBuf;
 
-use crate::config_types::ReasoningEffort;
-use crate::config_types::ReasoningSummary;
 use crate::protocol::AskForApproval;
+use codex_protocol::config_types::ReasoningEffort;
+use codex_protocol::config_types::ReasoningSummary;
 
 /// Collection of common configuration options that a user can define as a unit
 /// in `config.toml`.